如何添加插件

[mithenji]

问 如何在第四步添加所需的插件
mithenjideMacBook-Pro:ioniclub mithenji$ bower install moment --save
/usr/local/lib/node_modules/bower/node_modules/configstore/index.js:56
throw err;
^
Error: EACCES, permission denied '/Users/mithenji/.config/configstore/bower-github.yml'
You don't have access to this file.

at Error (native)
at Object.fs.openSync (evalmachine.<anonymous>:502:18)
at Object.fs.readFileSync (evalmachine.<anonymous>:354:15)
at Object.create.all.get (/usr/local/lib/node_modules/bower/node_modules/configstore/index.js:34:29)
at Object.Configstore (/usr/local/lib/node_modules/bower/node_modules/configstore/index.js:27:44)
at readCachedConfig (/usr/local/lib/node_modules/bower/lib/config.js:22:23)
at defaultConfig (/usr/local/lib/node_modules/bower/lib/config.js:11:24)
at Object.<anonymous> (/usr/local/lib/node_modules/bower/lib/index.js:40:32)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)